Rotary engine.



PATBNTBD MAY 21, 1907.' T. s. BARWIS.

ROTARY ENGINE. APPLIGATION FILED AUG. 2. 1906.

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` No. 854.141. PATENTED 4MAY 21.11907.

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ROTARY ENGINE.

. APPLICATION FILED AUG. 2. 1906. v

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BMW/f@ A TTOHNEYS THOMAS S. BARWIS, OF VANCOUVER, BRITISH COLUMBIA,CANADA.

ROTARY ENGINE.

Specicaton of Letters Patent.

Patented May 21, 1907.

Application filed August 2, 1906. Serial No. 328,836.

To al?, whorn/ t 711/14/ concern:

Be it known that I, THOMAS S. BARwIs, a subject of the King of GreatBritain, and a resident of Vancouver, in the Province of BritishColumbia and Dominion of Canada, have invented a new and Improved RotaryEngine, of which the following is a full, clear, and exact description.

This invention is an improved rotary en.

gine or turbine, having for an object to simply improve this class ofengines generally, and provide for the quick reversal of the same whendesired.

With this in view the invention consists of a cylindrical casing inwhich is journaled a revoluble drum, carrying blades subject to thepressure of the working fluid and having a shiftable member or partautomatically operable to change the direction of rotation.

This invention resides in certain special features of construction,which will be fully set forth hereinafter and particularly pointed outin the claims.

Reference is to be had to the accompanying drawings which illustrate asan example the preferred embodiment of my invention, in which drawingsFigure 1 is a vertical section of the invention on the line 1-1 of Fig.2; and Fig. 2 is a section on the line 2-2 of Fig. 1.

10 indicates the base of the engine or turbine, on which the cylindricalcasing 11 is mounted. The casing is provided with two admission ports 12and 12, and two exhaust ports 14 and 14 controlled by independent valves15, which may be of any desired form. The admission ports 12 and 12apass tangentially into the cylinder toward opposite sides thereof, andthe exhaust ports communicate with the admission ports at pointsadjacent to the opening of said ports into the interior of the casing.The revoluble member or drum comprises circular side members 16, whichhave tubular trunnions 17, revolubly mounted in bearings 18 on thecasing, and acylinder 29 having teeth 30. As shown, the side members 16are reduced in diameter for a portion of their width on their opposedfaces, for receiving the cylinder 29, and are provided with a series ofconcentric slots 32, equally spaced apart and equal in number to theteeth 30.

A number of pins 31 are threaded into or otherwise secured at each sideof the cylin der, and pass into the slots 32, thereby permitting saidcylinder to have a limited sliding movement on the side members.Extending between said side members 16 in the annular space at theoutside of the cylinder,'are rods 20 which serve as pivots for the wings21 as well as tie rods. The wings 21 are 'mounted on the rods in such away that the arms of the 'wings outward from the rods are longer v thanthe arms inward of the rods, and said wings are free to move around therods 2() as indicated. in Fig. 1. The casing has in its upper portion aninward projection or depressed portion 11 which extends in between theouter portion of the side members 16 of the revoluble member and whichforces the wings 21 to assume the horizontal position shown in Fig. 1,as said wings pass under the inwardly projecting part of the casing.

A central shaft 22 passes through the tubular trunnions 1.7 and iskeyed. or otherwise secured to them as illustrated in the drawings. Ashoe 23 at the bottom portion of the casing and directly opposite to thedepressed portion 11, is seated in a recess as shown in Fig. 1, and isprovided with a stem 24 depending through the base 10. For operatingthis stem and shoe a lever 25, pivoted at some suitable point as at 26,engages at its inner end with a notch in the stein, which admits of theelevation and depression to normal position of the shoe, when desired.

In the operation of the engine or turbine, assuming that the parts arein the position shown in Fig. 1 and that steam isadmitted through theport 12, as indicated by the arrow, this steam will act on the wings 21,causing the drum to turn, by reason of the engagement of the short armsof the wings with the teeth 3() as each of said Wings passes under thedepressed portion 11a. The central portion of the next adjacent wing tothe left and its cooperating tooth 30, which is under said depressedportion, acts as an abutment and prevents the escape of the steam inthis direction. As each compartment between the wings is filled withsteam,

it is revolved until it is o posite the exhaust 14 where it isdischarged), the wings at this point being turned on their pivots by thedepressed portion 11L to a horizontal position, as indicated in Fig. 1.If it is wanted to suddenly reverse, the lever 25 is operated to elevatethe shoe 23, and the steam port 12'DL and the exhaust port 14 are cutoff, and the ports 12 and 14a are opened. The wings 21 then turn ontheir pivots, most of them through the action of gravity, and those ICOIIO

which will not turn by gravity do so under the action of the shoe, andthe momentum of the cylinder 29 carries it forward relative to the sidemembers 16, until the pins 3l reach the opposite ends of the slots 32.The teeth 30 have then shifted their position, and are in place to beengaged at their opposite sides when the wings again swing to close thecompartments between them. The shoe is preferably held in an elevatedposition until the steam is on in this reverse direction and the wingshave made a complete revolution to insure their' proper shifting, afterwhich the shoe is dropped and the operation of the engine takes place inthe reverse direction in like manner.

Although I have described the invention in detail, it is to beunderstood that the precise embodiment is not material, provided itsessential characteristics are carried out as pointed out in the annexedclaims.

Having thus described the preferred form of my invention, what I claimas new and desire to secure by Letters Patent is:

1. In an engine, the combination of a casing having admission andexhaust ports, a drum operating therein, comprising side membersconnected to turn together, a cylinder extending between the sidemembers and having movement relative thereto, wings pivotally mountedbetween the side members, teeth carried by the cylinder and adapted tobe engaged by the wings, for the purpose specified, and means permittingthe relative shifting of the cylinder.

2. In an engine, the combination of a casing having admission andexhaust ports, a drum operating therein, comprising side membersconnected to turn together, a cylinder extending between the sidemembers and having movement relative thereto, wings pivotally mountedbetween the side members, teeth carried by the outer side of thecylinder and adapted to be engaged by the wings, for the purposespecified, and means permitting the relative shifting of the cylinder.

3. A rotary engine having a casing with admission and exhaust ports, arevoluble member operating in the casing, wings pivotally mounted on therevoluble member, and means coacting with the wings to prevent pivotalmovement in one direction, said means being adjustable to reverse thedirection of pivotal movement of the wings, whereby to permit thereversal of the engine.

l. A rotary engine having a casing with admission and'exhaust ports, adrum operating therein and' formed of two relatively movable members,wings pivotally mounted on one of said members of the drum and engagingthe other member, whereby to permit the wings pivotal movement in onedirection only, said second member of the drum being adjustable toreverse the direction of pivotal movement of the wings for the purposedescribed.

5. A rotary engine having a casing with admission and exhaust ports, adrum operating therein and formed of two relatively movable members,wings pivotally mounted on one of said members and engaging the othermember, whereby to permit the wings pivotal movement in one directiononly, said second member of the drum being adjustable to reverse thedirection of pivotal movement of the wings, and a shoe for assisting insaid pivotal movement as described.

6. A rotary engine having a casing with admission and exhaust ports, adrum operating therein and comprising side members with a relativelymovable cylinder extending between them, wings pivotally mounted betweenthe side members and engaging said cylinder, and means for shifting thecylinder relatively to the wings, for the purpose specified.

7. A rotary engine having a casing with admission and exhaust ports, adrum operating therein, and comprising side members, and a relativelyshiftable cylinder extending between the side members, wings pivotallymounted between said side members, the pivots of the wings beingadjacent to the inner edges thereof, and the cylinder having teethadapted to engage the inner portions of the wings, and means for movingthe cylinder relatively to the side members.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

THOMAS S. BARI/VIS.

Vitnesses:

L. EDWIN DUDLEY, N. C. SAwERs.

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